Continuous phase composite for musculoskeletal repair
View Patent ↗A composite material for positioning in the anatomy to form a selected function therein. The composite may be resorbable over a selected period of time. The composite may allow for selected bone ingrowth as absorption of the composite occurs.
1. A resorbable spinal implant, comprising:
a member including a composite formed of,
a first material comprising a first resorbable material operable to be resorbed into an anatomy, the first material forming a scaffold having a plurality of pores and a plurality of continuous channels defined at least in part by a first sub-plurality of the plurality of pores, the plurality of channels extending through the scaffold; and
a second material that is a resorbable polymer injected into the scaffold to substantially fill at least a sub-plurality of the plurality of continuous channels so that the polymer forms a continuous structure;
wherein the second material is a polymer selected from the group comprising polylactic acids, polyglycolic acids, and combinations thereof, and forms about 55 wt % to about 65 wt % of the member;
wherein the resorbable polymer is resorbed at a rate slower than a rate of resorption of the scaffold such that the resorbable polymer defines a support for bony ingrowth to maintain a selected strength of the member;
wherein the member is operable to be positioned between a first vertebrae and a second vertebrae.
2. The implant of claim 1 , wherein the second material is operable to resorb at a rate wherein the member remains substantially intact under at least about 2000 Newtons of compressive force after at least six months after implantation.
3. The implant of claim 1 , wherein the member comprises a first wall having a height, a second wall having a height less than the height of the first wall, and a surface extending substantially orthogonal to and between the first wall and the second wall.
4. The implant of claim 3 , wherein the member defines a void in the surface.
5. The implant of claim 3 , wherein at least one continuous channel extends from the first wall to the second wall of the member.
6. The implant of claim 1 , further comprising:
a second sub-plurality of the plurality of pores that are only partially filled;
wherein both the first sub-plurality of pores and the second sub-plurality of pores includes continuous pores with interconnecting channels.
7. The implant of claim 1 , wherein the implant has a substantially linear rate of strength decrease over time;
wherein rate of strength decrease of the implant is selected based upon the selected second material.
8. The implant of claim 1 , wherein the first material comprises an absorbable ceramic.